Obtenção e caracterização de compósitos com matriz poliéster reforçada com fibras

Abstract

Over the years, there has been a growing demand for materials with good mechanical properties and light weight. In these senses, composite materials are highlighted because they meet these requirements like no other material, by combining a matrix, usually a polymer, together with a reinforcement such as fiberglass. Due to this interest, studies to evaluate the mechanical behavior are necessary for use as structural elements. With that in mind, the present work aims to evaluate the influence of different reinforcements, in the case of this study aramid pulp and chopped glass vibrate, on a polyester matrix. The specimens were manufactured in 3 different groups: CPA (polyester resin and aramid pulp reinforcement), CPV (polyester resin and fiberglass reinforcement) and CPR (specimen of pure resin). These were subjected to Shore hardness tests, uniaxial tensile tests and 3-point bending tests, using ASTM 3039 and ASTM D790 standards for tensile and bending tests, respectively. The results showed that the addition of reinforcement did not significantly alter the elastic modulus and hardness of the composite, but in terms of maximum stress at rupture, deformation and deflection, the reinforcements caused a considerable reduction in there mechanical properties.